Posted by Pete McBreen 19 May 2019 at 04:00
Recently I have been looking at Erlang and Elixir, and in the process was reading Coders at Work and came across this quote from Joe Armstrong (pg 213)
I think the lack of reusability comes in object-oriented languages, not in functional languages. Because the problem with object-oriented languages is they’ve got all this implicit environment that they carry around with them. You wanted a banana but what you got was a gorilla holding the banana and the entire jungle.
If you have referentially transparent code, if you have pure functions –all the data comes in its input arguments and everything goes out and laves no data behind – it’s incredibly reusable. You can just reuse it here, there and everywhere…
Something to think about.